What's Included? 12 Square Feet Per Box 96 Pieces Per Box Features No tools, mixing, or thin-set are required. Grouting is optional. Can be applied directly to an existing mirror or bathroom mirror. Easy and quick installation; Instaset mastic affixed to the back of each tile. Indoor use only, avoid installing in areas exposed to full daytime direct sunlight. Naturally Mold, Mildew, and Stain Resistant.